Cary Pint

Researchers at Vanderbilt University are making something useful out of carbon dioxide pulled from the air: Small-diameter carbon nanotubes. Their CNTs are not only higher quality, but the process to make them is cheaper than current methods.

Researchers from Vanderbilt University in Nashville, Tenn., used scraps steel and brass to create what they say is the world’s first steel-brass battery that can store energy at levels comparable to lead-acid batteries.